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Encyclopedia > Wilhelm Johannsen
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Wilhelm Ludvig Johannsen (February 3, 1857 - November 11, 1927) was a Danish botanist. In 1909, he coined the word gene (using the Greek for "to give birth to"). Jump to: navigation, search February 3 is the 34th day of the year in the Gregorian Calendar. ... 1857 was a common year starting on Thursday (see link for calendar). ... Jump to: navigation, search November 11 is the 315th day of the year (316th in leap years) in the Gregorian Calendar, with 50 days remaining. ... Jump to: navigation, search 1927 was a common year starting on Saturday (link will take you to calendar). ... Botany is the scientific study of plant life. ... 1909 was a common year starting on Friday (see link for calendar). ... This stylistic schematic diagram shows a gene in relation to the double helix structure of DNA and to a chromosome (right). ...


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Wilhelm Ludwig Johannsen Biography / Biography of Wilhelm Ludwig Johannsen World of Biology Biography (394 words)
Wilhelm Johannsen, whose family did not have the financial means to provide him a college education, served as an apprentice to a pharmacist in 1872 and taught himself chemistry and botany.
Johannsen knew that the offspring of a pure line were genetically identical and his pure line theory suggested that any differences among them must be due to chance and environment--not natural selection.
Johannsen clarified the terminology by coining the term gene to describe a unit of inheritance.
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